A Microfluidic Platform for Characterization of Protein-Protein Interactions

M. Javanmard and F. Pease are with the Department of Electrical Engineering, Stanford University, Stanford, CA 94305 USA (
IEEE Sensors Journal (Impact Factor: 1.76). 08/2009; 9(8):883-891. DOI: 10.1109/JSEN.2009.2022558
Source: PubMed


Traditionally, expensive and time consuming techniques such as mass spectrometry and Western Blotting have been used for characterization of protein-protein interactions. In this paper, we describe the design, fabrication, and testing of a rapid and inexpensive sensor, involving the use of microelectrodes in a microchannel, which can be used for real-time electrical detection of specific interactions between proteins. We have successfully demonstrated detection of target glycoprotein-glycoprotein interactions, antigen-antibody interactions, and glycoprotein-antigen interactions. We have also demonstrated the ability of this technique to distinguish between strong and weak interactions. Using this approach, it may be possible to multiplex an array of these sensors onto a chip and probe a complex mixture for various types of interactions involving protein molecules.

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Available from: Ronald Davis, Jun 29, 2014
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